Yes. Very small quantities can present different sensing conditions from a normal suitable load. Consult the model's guidance for single items or finishing tasks.
Understanding this situation
A short or inconsistent result on one small piece does not identify a failed sensor. The appliance may offer a particular permitted timed option, but that still has to match the garment's care limits.
A useful next step
Use the documented approach without adding incompatible items just to increase quantity. If normal loads also change, include that observation in the enquiry. Do not open covers or adjust hidden calibration settings to compensate.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.